Carboxymethyl chitosan (CMCS) aerogels were prepared through sol-gel combining with freeze drying technology. The effects of CMCS concentration on the gelation time, volume shrinkage, density, porosity, compressive strength and hygroscopicity were investigated. Meanwhile, the CMCS aerogel was characterized by Fourier transform infrared (FTIR) and scanning electron microscopy (SEM). Then the CMCS aerogel was hydrophobic, modified through cold plasma modification technology, and oil absorbency of hydrophobic modified CMCS (HMCMCS) aerogel was researched. The results showed that the CMCS aerogel had the lowest density of 0.022 g/cm³, the maximum porosity of 95.34%, the highest compressive strength reached 1.74 MPa and a three-dimensional (3D) network heterogeneous porous structures in the inner areas. After hydrophobic modification, the water contact angle of 2% for HMCMCS aerogel with 20 min under 60 W reached 117 ^o. Besides, the HMCMCS aerogel represented excellent oil adsorbing property and outstanding recyclability, for the oil adsorption rate was up to 31.6 g/g and stable in multiple cycles.

采用溶胶-凝胶结合冷冻干燥技术制备羧甲基壳聚糖(CMCS)气凝胶。研究了CMCS浓度对凝胶时间、体积收缩、密度、孔隙率、抗压强度和吸湿性的影响。同时，CMCS气凝胶通过傅里叶变换红外（FTIR）和扫描电子显微镜（SEM）进行表征。然后通过冷等离子体改性技术对CMCS气凝胶进行疏水改性，研究了疏水改性CMCS(HMCMCS)气凝胶的吸油性。结果表明，CMCS气凝胶的最低密度为0.022  g/cm ³，最大孔隙率为95.34%，最高抗压强度达到1.74 MPa 和内部区域的三维 (3D) 网络异质多孔结构。疏水改性后，HMCMCS 气凝胶 在 60  W下20 min的 2% 水接触角达到 117 ^o。此外，HMCMCS 气凝胶具有优异的吸油性能和出色的可回收性，吸油率高达 31.6  g/g，并在多次循环中保持稳定。